.sparkline-histogram {
  display: flex;
  align-items: flex-end;
  height: 50px;
  width: 100%;
  background-color: #f0f0f0;
  padding: 5px;
  box-sizing: border-box;
}

.sparkline-bar {
  flex: 1;
  background-color: #007bff;
  margin: 0 1px;
  min-width: 2px;
}